Same 2 ported saws. 2 different sounds

[Stihlmar]

Just a random thought for today....

I have 2 - 026's. Both are ported but have 2 completely different sounds.

The one that is quieter and doesn't really bark is a later 026 black lever. It has everything done to it the other one does except the muffler is slightly more opened up. But not as loud??

The louder one is a alittle older red lever. It is significantly louder and has that bark of a ported saw.

What would make the difference? Same saw. Same muffler. Obviously different cylinders and ported slightly different. Will porting differences really make that much difference in sound?

 

[cuinrearview]

Yes?

 

[Stihlmar]

Stupid question??? Just looking to learn. What makes the difference then?

Exhaust height?

Transfer height/angle?

Different timing advance maybe???

 

[Mad Professor]

How is compression on each? If one has a much tighter squish that can account for some of it.

 

[Stihlmar]

There is a slight differnece in squish between them. The louder one has more squish and less compression.

 

[Little Al]

There is a slight differnece in squish between them. The louder one has more squish and less compression.

If the the squish is tighter ie. less clearance & no work on the piston/rod that would make the compression higher as the piston would by closer to the squish band/head if the compression is lower surely the squish clearance is greater

 

[Stihl 041S]

What is the oil and what ratio?

 

[pioneerguy600]

Combustion chamber shape and cc`s..

 

[svk]

The location of the exhaust outlet on the muffler has a major impact on how loud and crackly a saw sounds. Perhaps the internals of the muffler are slightly different as well.

 

[holeycow]

Not saws but related;

Two brand new 2006 Honda cr85 motorbikes within about 10 numbers apart assembled on the same day in Japan.

To make them run best they were jetted differently, had different heat-range plugs and very different suspension set-up.

They also sounded different and had slightly different power characteristics. One was a little quicker than the other, one had a meagre semblance of midrange. Jetted the same one was lean and one was rich. These two bikes were identical, but not.

Manufacturing tolerances and assembly create non-identical machines out of identical ones.

The op’s saws aren’t even identical, so no surprise.

 

[Bullets]

Can you swap the mufflers that's interesting